Going into the evening's final session, with Russia among the teams still to come, the U.S. led Britain by 2.922 points with Japan third. Consistent performances by Danell Leyva and John Orozco across the six apparatus gave the Americans, cheered on by enthusiastic, flag-waving fans at the North Greenwich Arena, the edge.

Scores are reset to zero in Monday's team final, for which the best eight teams qualify.

Nineteen-year-old Orozco is the 2012 Visa National Champion, Puerto Rican and a native of the Bronx, New York.

The nineteen-year-old Leyva is the USA All-Around champion and the 2011 World champion on the parallel bars. Leyva was born in Cuba and his mother and father—both former members of Cuba's national gymnastics team—later defected to America.